Ch.XXII, p.519, f.1

"Following an immemorial custom of the Orient, usage exemplified at the siege of Bethulie as well as at the tomb of our Lord, the sentinel is a soldier who sleeps, to his heart's content, at the post which he is expected to guard." (Comte de Gobineau's "Les Religions et les Philosophies dans l'Asie Centrale," p. 166.) "We have been able to see throughout this history what the Persian guards are; their functions consist principally in sleeping by the trust that they are given to watch over." (A. L. M. Nicolas' "Siyyid Ali-Muhammad dit le Bab," p. 378.)